Arlington / Hamilton
Hamilton has 589 residents (give or take 210) (ACS 2020-2024 5-year, table B01003, https://data.census.gov/table/ACSDT5Y2024.B01003?g=160XX00US5134240, checked 2026-10-19), about 2,653 people per square mile.
Hamilton is about 35 miles from the Census center point for Arlington in a straight line and covers 0.222 square miles of land (Census 2024 Gazetteer internal points and land area, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/, checked 2026-10-19).
Of the 222 occupied homes in Hamilton, 4% heat with natural gas, 14% with heating oil, 66% with electricity and 14% with propane (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=160XX00US5134240, checked 2026-10-19).
Electricity already heats 66% of Hamilton homes, ahead of oil at 14%, and a home on electric baseboard sees the biggest bill change from a heat pump because it replaces resistance heat one for one.
Hamilton has 12 points more oil heat than Loudoun County as a whole, where 2% of homes burn oil, and 35 points more electric heat than the county's 31% (ACS 2020-2024 5-year, table B25040, https://data.census.gov/table/ACSDT5Y2024.B25040?g=050XX00US51107, checked 2026-10-19).
Hamilton has 222 housing units, 23% built before 1940 and 73% before 1980, with 19% built in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US5134240, checked 2026-10-19).
Hamilton has 21 points more pre-1940 homes than Loudoun County as a whole (2%) and 38 points fewer homes built after 2000 than the county's 57% (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=050XX00US51107, checked 2026-10-19). An older stock means more insulation upgrades before the heat pump goes in.
The median Hamilton home was built in 1973 (ACS 2020-2024 5-year, table B25035, https://data.census.gov/table/ACSDT5Y2024.B25035?g=160XX00US5134240, checked 2026-10-19) and the median home has 7.4 rooms (ACS 2020-2024 5-year, table B25018, https://data.census.gov/table/ACSDT5Y2024.B25018?g=160XX00US5134240, checked 2026-10-19).
70% of Hamilton homes are single-family detached, 4% are in two- to four-unit buildings and 3% are in buildings of five or more units (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=160XX00US5134240, checked 2026-10-19).
With 70% detached houses and 4% in small multi-family buildings, a Hamilton quote is usually one or two outdoor units with ducted or ductless heads sized room by room. With 14% of Hamilton homes rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US5134240, checked 2026-10-19), the landlord signs the quote in many of them.
Hamilton has 19 points more detached houses than Loudoun County overall (51%) and 12 points fewer five-plus-unit buildings than the county's 15% (ACS 2020-2024 5-year, table B25024, https://data.census.gov/table/ACSDT5Y2024.B25024?g=050XX00US51107, checked 2026-10-19).
Only 14% of Hamilton homes are rented (ACS 2020-2024 5-year, table B25003, https://data.census.gov/table/ACSDT5Y2024.B25003?g=160XX00US5134240, checked 2026-10-19), so nearly every quote here is the resident talking to the installer directly, and the rebate goes to the person living in the house.
73% of Hamilton homes were built before 1980 and only 19% in 2000 or later (ACS 2020-2024 5-year, table B25034, https://data.census.gov/table/ACSDT5Y2024.B25034?g=160XX00US5134240, checked 2026-10-19), so most of the stock predates modern insulation codes; the installer's heat-loss calculation, not a square-footage rule, decides the tonnage.
No electric utility is on file for Hamilton on this door yet, so this page does not name one; the name on the bill decides which rebate path applies.
Median household income in Hamilton is $141,250 (ACS 2020-2024 5-year, table B19013, https://data.census.gov/table/ACSDT5Y2024.B19013?g=160XX00US5134240, checked 2026-10-19); many state and utility heat pump rebate programs set higher incentive tiers for income-qualifying households, so the household income on the application, not the town median, decides which level applies.
Heating design temperature: 12F. Source: ENERGY STAR Design Temperature Limit Reference Guide (2019 Edition), Loudoun County row, 99% heating, PDF pages 127 to 133 of 141 (Revised 11/11/2020), https://www.energystar.gov/sites/default/files/Design%20Temperature%20Limit%20Reference%20Guide%20(2019%20Ed)%20-%20ENERGY%20STAR%20Single-Family%20New%20Homes_Rev11.pdf, fetched 2026-10-19, 99%.
That 12F figure is the Loudoun County cold-day number a Hamilton heat pump is sized against, so ask the installer to show the system's heating output at 12F, not at the milder rating-label temperature.
Ask for the heat-loss calculation room by room; the median Hamilton home has 7.4 rooms and was built around 1973, and the count of heads and the tonnage follow the rooms and the insulation, not the square footage.
The form on this page is the follow-up for Hamilton. The public number is the number the contractor quotes from.
No local contractor is named on this door for Hamilton yet. A request from this page goes to the first licensed shop that takes the door.